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Optically coherent nitrogen-vacancy centers in m-thin etched diamond membranes
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Optically coherent nitrogen-vacancy centers in m-thin etched diamond membranes
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Optically coherent nitrogen-vacancy centers in m-thin etched diamond membranes
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Paper
Optically coherent nitrogen-vacancy centers in m-thin etched diamond membranes
2019
Overview
Diamond membrane devices containing optically coherent nitrogen-vacancy (NV) centers are key to enable novel cryogenic experiments such as optical ground-state cooling of hybrid spin-mechanical systems and efficient entanglement distribution in quantum networks. Here, we report on the fabrication of a (3.4 \\(\\) 0.2) m thin, smooth (surface roughness r\\(_q\\) < 0.4 nm over an area of 20 m by 30 m diamond membrane containing individually resolvable, narrow linewidth (< 100 MHz) NV centers. We fabricate this sample via a combination of high energy electron irradiation, high temperature annealing, and an optimized etching sequence found via a systematic study of the diamond surface evolution on the microscopic level in different etch chemistries. While our particular device dimensions are optimized for cavity-enhanced entanglement generation between distant NV centers in open, tuneable micro-cavities, our results have implications for a broad range of quantum experiments that require the combination of narrow optical transitions and m-scale device geometry.
Publisher
Cornell University Library, arXiv.org
